Clearing mechanism for the work supports of fastening-inserting machines



Oct 23, 1945.

' '.1. F.'sTAND|s|-| v v 2,387,305 CLEARING MECHANISMS `FOR THE WORK-SUPPORTS OF FASTENING-INSERTING MACHINES Filed March 29, 1944 l John .Standish Patented Oct. 23, 1945 Unirse STATES .PATENT oFFlcE CLEARING MECHAN-ISM FOR THE WORKA SUPPORTS OF FASTENING-INSERTING MACHINES John F. Standish, Winthrop, Mass., assignor to United Shoe Machinery Corporation, Flemington, N. J., a corporation of New Jersey Application March 29, 1944, Serial No. 528,510

13 Claims.

This invention relates to Vclearing mechanism,

and especially to means for preventing the deposit of chips or other Waste in the Vdrivertransferring member or loader-block comes forward to make its delivery to the jack-passages, this material may be pushed forward over the front driver-passages, and upon return of the loader-block some of the Waste material mayV be dragged back over the rear passage. The pieces may be of sufficient size to bridge the passages' y and prevent the entrance of the nails, while some of the material may enter, and, gathering upon the upper ends of the drivers, so deflect the points of the nails that they Will be inserted incorrectly. An object of my invention is to render impossible the retention of waste upon the top of the Work-support.

I attain the above object by directing a Wasteremoving air-current across the topof a worksupport or jack in which are driver-passages, and, to make certain that the top is cleared of the waste immediately before the arrival of the transferring member, the air-current is created in the advance movement of said member above the work-support. Preferably, this is effected by a member movable with the actuating mechanism for the transferring'member, and, to ensure the correctness of the time of actionv of the aircurrent with respect to the travel of the transferring member, this may be varied. More specically, I associate with the jack of a heel-attaching machine, through the top of which jack are driver-passages supplied with nails by a reciprocatory loader-block, a cylinder,` a piston movable in the cylinder, a tube leading from the cylinder and directed toward the jack-top, a spring by which the piston is urgedtoward the opening of the tube into the cylinder, and means for retracting the piston and releasing itv to receive the action of the spring. Upon this release, the spring-,actuated 'movement of the pistonv delivers from the tube across the jack-top anabrupt and strong current of air, which is highly effecune III- 1n of Fig. 1.

tive in disposing of the waste. The retraction and release of the piston may be effected directly from the mechanism by which the loader-block is reciprocatedy and thus the delivery of the aircurrent readily synchronized with the travel of the loader-block. In the organization herein disclosed, a lever is connected to the piston and spring, and an arm is movable with an oscillatory shaft from which the loader-block is reciprocated, the arm in its movement first engaging the lever to retract the piston and tension the spring, and vthen releasing the lever and piston to -permit the spring to act and create the air-current from the tube.

A particular embodiment of the invention is illustrated in the accompanying drawing, in which:

Fig. 1 shows the mechanism of this invention in side elevatiomin place upon a heel-attaching machine;

Fig. 2 is an enlarged broken side elevation of the clearing mechanism; and

Fig. 3 is an enlarged sectional detail on the At I0 appears a portion of the frame-column of a heel-attaching machine, which is that of the previously mentioned Standish et al. patent.

In a jack I2 rising from the front of the machine are vertical passages I4, in which reciprocate nail-inserting drivers IB. Upon the top I8 of the jack, the shoe to be heeled is placed with its insole resting upon said top. If a shoe with an applied heel has previously been drilled through the heel-seat into the heel and a temporary screw inserted,'the h"ole which is left after the screw has been removed and the last pulled is liable to contain chips resulting from these operations. Upon inverting the shoe over the jack, this hole comes near the center of the group of driver-passages, and the chips falling from the hole will gather upon the jack-top. To deliver the attaching nails to the jack-passages, a loader-slide 2D is mounted to reciprocate upon the frame to presentl its block 22 beneath the foot-plate 23 in nail-receiving position, as illusupon the shaft and is actuated by the lever 38. When the loader-block 22 makes its delivery of nails to the jack, its underside travels close to the jack-top I8, and its forward edge will tend to sweep over the driver-passages I4 any chips whichlmay. have fallen fromnthe .shoegpreviously operated upon."Reverse movementof: the loaderblock may drag the chips beneath it across the rear passage. The passage-openings may become so obstructed the loader-block cannot deliver its nails, or accumulating uponzthe driver-ends; the chips may so act upon theinaillheadslthat;1instead of toeing in, the points of the nails will incline outwardly and perhaps .break through.the wall of the heel. These -conditionsthe-,present invention guards against.

A cylinder 5D has formed With ,it lugs ,52, through openings in which itfisattachedtto'the interior of the frame-column I by screws 53. Made into an opening in the closed upper end #ofthef-'cylinderisa tube"A 54, leadingtoba point .iwithin-andat one side-off'the columnjustabove "-thepathof the loader-'slide'- 20. 1I-lere, iteisemade kfintcva' threadedopeningin the Wall-"by aiunionselben/155. '-Intcv this opening kloutsideA the'- column- '=wall= a-k ruiionf-` lbowi `is= threaded, thiscarrying #afpiece-S of'tubingwithan angular endtermi- Aynating 'in anozzlel; havingiacontracted voutlettopeningtli. lyturriingfthe tube-6ll inthe union iand' the-'union itself 4in the column,'slightly making or unmaking the thread, v'the nozzle- 'fopenin'gf may be adjustedl in intersecting planes, ``Ain:vvliichfthetubingmis swung and in which` its angular end is movable; to-'direct the 'discharge l'from'ithefopening uponLany'desi-redarea of the i-'jaekltop i8. LA u.piston- 66 Iis ymovable `Within'` the cylinder U, and is joined by a link 68 toa' lever -FIIl f'tulcrumed-atn r`uponan --extension I4l from :Y-theeylinder. -A tension-springer springs IIfconnected to the lever and to a lug at the'upper-end '-ofi'thecylinder, holdsthe piston Anormally up to the cylinder-head. "-To thef'shaft;42,'to-which is :securedthe actuating -lever'l38 for'the loaderslide, is attached an arm 'I8 havingpivoted upon itsaendf toward? the cylinder fa'fcontact-piece 8U. `lThiscon-tact'-piece is held yieldably byan expansion'spring- 82'-atanangledetermined bya stop- --iscrew=84. The angular end ofthey contact-piece Eflies normally vjust abovefand close to the `outer 4-edge oflafsurfaceii upon a contact'eblock` 88 fixedito the" 1ever'10. v

-YAssumingthatthe operator/.has just removed from thejack I2 a-shoe: with-its attached heel, .there may have been 'deposited upon the jackntop I8"`chips,=as indicated at c in'Fig. 1. In prep- 44ar-ation f for the heeling of the succeeding shoe, ithe operator depresses'the lever'25, which causes f,theloaderLblock'Zwith its loadof nails totravel Fior-Ward fromI the foot-plateZS. As the 'shaft' 42 "rockscontraclockwise in eiecting this movement fof 'the loader-block through the levers 138 and f di); the arm? 18' turns'with "it inthe same direction. :Byf theeengagernent -of` the contact-piece 8D'- with fthezblocksurface upon' the lever '10, said lever l:isturned clockwise, lowering the piston 66 in the -"eylirider"l'1and tensioning the springi'IB. 'Dur- 1ing'this"movement, air is' being `drawn in idly 'fthroughthe-'nozzleiopening 64 and tubes 6I)v and 354. *As the`- loader-blockis approaching; the-jack, the end or the ycontact-piece lwill-*havegradually snif-ted outwardly across' the surface 86, because -of thel-downwardidivergence'of the arcs described "by thefpoints'ofsengagementof the lever Ill and the arm" lll-'about the axis ofthe fulcrum"`I2 and AY`tha`.t"of'-the 'shaft IIL-respectively. IWl-tlen"the loader-block is still somewhat removed from the jack-top, the contact-portions of the lever and arm will separate, this being shown in dash-lines in Fig. 2 as about to occur. The lever will therefore be released from the arm, and the spring will .abrupily retract the piston,.carryi.ng it to the head -off'thezcvlinder. "i There :will be discharged through the nozzle-opening 64 a sudden and stro-ng blast of air, which, because of the position of the nozzle, 10 Will be directed upon the jack-top, completely clearing this. 'Therefora when the loader-block reachesftheacklto deliver its nails to the'passages ifdfthere -Will be no waste material to be ,--torced into: said,.passages, and these will not be- ..15rcome clogged. .--As the loader-block is returned .fby.'itsf-.actuatingnmechanism to its normal position beneath the foot-plate, the arm I8 rises and `the'rcontactiaiece A8B, engaging the end of the ..now raised lever T0, yields against its spring 82 and, when it reaches the end of its stroke, is lcarriedby saidspring to its linitialposition-above thel-surfaee'. *The operator-proceeds Y'with the attachmentooffthe'inext lheel' and the V'clearing mechanismilis'ready for operationjupon thel suc- ,.25 ceeding actuatonwofthe' lever125,' following the frernov'alfrom 'theaclr of-"the heeled shoe. Since =fthewoilr ldone bythe clearing- 'mechanism' merely -:consists-irrdravving@air-into the nozzle'an'd tenf-"sioni-ngthe spring*16,*the'additional load which -it places-upon thefdriving mechanism is negligible, #and theresistancef't the overload device '-26 'to *releasing need `not be increased. Thus, the ipro- =tection =Whi`ch z'this -foverload `device` affords .the 'nailesupplyingmechanism 'is notaiected. 'It is 35 fto'becbserved vthat the clearing mechanism is in the? form' ofl ein-independent Iunit,` whichi may be f applied toI theD fastening#insertirtsgl machinery/'ithrout-r-al-teration rin`- the y:structure of the machine ='7itse1f. v"Ihe' time Lat -"which V -the arm 78 releases 40 @ther-piston-leverlll'may be varied by adjustment sofi the =sorew-`84, and therefore' the -4relation Y`of fthe'*contacft-fpiece to the edge of" the block 88. :Thusj the exact period in the travel ofthe loader- "l block at ffwhi'ch" the jack-clearing Aaction 'occurs 145 rmay'be'determined Having f' describeduny` invention,- what I claim @as newarid desire to secure' -by` Letters Patentof Ithe"United lStates Lis:

1. In a fastening-inserting'machine, a workosupport provided with a' passage opening through fthe` topof'thesupport, 1a "driver movable in the 'passage'to inserta fastening in the work, and -Ameansffor directing anzair-'current across. the .top Y"of the support *prior* to the inserting movementv of v"thedriven y "2.' In^a-`fasteninginserting .machine,..a ,worksupport-provided with: a passage opening. through Nfthe'top of'the support, a fastening-.driver-movl"able iin *the .passage, .a fastening-.transferring ""v member movable over. the top of the support-and `means foridirecting an ain-current. across ,the rtop ofthe 'support in 'advance-.,0f the movement above said^ support. of'. 'the transferring member.

1A3.`""InA aA fastening-inserting .,machine, a 'work- "support providedwith a passageopeningthrough fthe top of '1 the support, a fastening-driver .mova-ble `irl i the message, a vfastening-transferring member 'movable over the' topv of vthe support, .ac- F vvtuatingr mechanism for 'ther transferring member, "10"a;rid,fmeans"including a .member-movable .with

theractuating mechanism lfor .directing an air- 'currentacrosslthe topof .the support. 4."In a. fasteningeinserting machine, ...a -workl support;provided:withiapassageopeningthrough the"top*'ofthe support, a fastening-driver movable in the passage, a fastening-transferring member movable over the top of the support, means for directing an air-current across the top of the support in advance of the movement above said support of the transferring member, and means arranged to vary the time of delivery of theair-current.

5.In a fastening-inserting machine, a Worksupport provided with a passage opening through the top of the support, a fastening-driver movable in the passage, a fastening-transferring member movable over the top of' the support, actuating mechanism for the transferring member, means including a member movable With the actuating mechanism for directing an air-current across the top of` the support, and means arranged to vary the time at which the movable member alects the air-directing means.

6. In a heel-attaching machine, a jack provided at its top with passages, fastening-drivers reciprocable in the passages, a reciprocatory loader-block delivering to the passages, a cylinder, a piston movable inthe cylinder, a tube leading from the cylinder and directed toward the jack-top, a spring by which the piston is urged toward the opening of the tube into the cylinder, and means for retracting the piston and releasing it to receive the action of the spring.

7. In a heel-attaching machine, a jack provided at its top With passages, fastening-drivers reciprocable in the passages, a reciprocatory loader-block delivering to the passages, a cylinder, a piston movable in the cylinder, a tube leading from the cylinder and directed toward the jack-top, an oscillatory lever connected to the piston, a spring acting upon the lever to urge the piston toward the opening of the tube into the cylinder, and an oscillatory arm movable to actuate the lever and to release it to permit the spring to act.

8. In a heel-attaching machine, a jack provided at its top with passages, fastening-drivers reciprocable in the passages, a reciprocatory loader-block delivering to the passages, a cylinder, a piston movable in the cylinder, a tube leading from the cylinder and directed toward the jack-top, an oscillatory lever connected to the piston, a spring acting upon the lever to urge the piston toward the opening of the tube into the cylinder, an oscillatory arm, and a contact member yieldable upon the arm and movable in engagement with the lever to actuate it and to release it to permit the spring to act.

9. In a heel-attaching machine, a jack provided at its top with passages, fastening-drivers reciprocable in the passages, a reciprocatory loader-block delivering to the passages, a cylinder, a piston movable in the cylinder, a tube leading from the cylinder and directed toward the jacktop, an oscillatory lever connected to the piston, a spring acting upon the lever to urge the piston toward the opening of the ltube into the cylinder, an oscillatory arm, a contact member yieldable upon the arm and movable in engagement with the lever to actuate it and to release it to permit the spring to act, and means arranged to vary the normal position of the contact member upon the arm.

10. In a heel-attaching machine, a jack provided at its top With passages, fastening-drivers reciprocable in the passages, a reciprocatory loader-block delivering to the passages, an oscillatory shaft by which the loader-block is reciprocated, a cylinder, a piston movable in the cylinder, a tube leading from the cylinder and having a nozzle delivering to the jack-top, a spring by which the piston is urged toward the opening of the tube into the cylinder, and means movable by the shaft for retracting the piston and releasing it to receive the action of the spring.

11. In a heel-attaching machine, a jack provided at its top with passages, fastening-drivers reciprocable in the passages, a reciprocatory loader-block delivering to the passages, an oscillatory shaft by which the drivers are reciprocated, a cylinder, a piston movable in the cylinder, a tube leading from the cylinder and having a nozzle delivering to the j ack-top, a lever fulcrumed upon the cylinder and connected to the piston, a spring joining the lever to the cylinder, and an arm movable by the shaft in engagement with the lever.

12. In a heel-attaching machine, a jack provided at its top With passages, fastening-drivers reciprocable in the passages, a reciprocatory loader-block delivering to the passages, an oscillatory shaft by which the drivers are reciprocated, a cylinder, a piston movable in the cylinder, a tube leading from the cylinder and having a nozzle delivering to the jack-top, a lever fulcrumed upon the cylinder and connected tothe piston, a spring joining the piston to the cylinder, an arm movable by the shaft in engagement With the lever, a contact member pivoted upon the arm for engagement with the lever, a stop-screw by which the position of the contact member may be adjusted, and a spring interposed between the arm and the contact member to force said contact member against the stop-screw.

13. In a heel-attaching machine, a frame-column in which is an opening, a jack supported upon the column and provided in its top With driver-passages, means situated within the column for producing an air-current, a tube-section leading from the air-current-producing means to the column-opening, an outer tube-section leading from the column-opening and having a nozzle directed toward the jack-top, and means for supporting the outer tube-section for movement to vary the position of the nozzle in intersecting planes.

JOHN F. STAND-ISH. 

